NiControllerSequence complete redo, other ctlr changes

Corrected naming, filled unknowns, and redid documentation for NiControllerSequence/NiSequence incl the ControlledBlock compound.

Added documentation regarding Controller ID and Interpolator ID (previously "Variable 1" and "Variable 2").

Added a few missing controllers.   Fixed NiLightColorController to not be related to NiMaterialColorController.

Fixed BSPSysMultiTargetEmitterCtlr inheritance.